USN-9000-1: Twisted vulnerability

Publication date

4 November 2026

Overview

Twisted could be made to crash if it received specially crafted network traffic from an authenticated user.


Packages

  • twisted - Event-based framework for internet applications

Details

It was discovered that Twisted's IMAP server mishandled wildcard
patterns in mailbox list commands. An authenticated remote attacker
could possibly use this issue to cause Twisted to use excessive
resources, leading to a denial of service.

It was discovered that Twisted's IMAP server mishandled wildcard
patterns in mailbox list commands. An authenticated remote attacker
could possibly use this issue to cause Twisted to use excessive
resources, leading to a denial of service.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
26.10 stonking python3-twisted –  26.4.0-4ubuntu0.1
26.04 LTS resolute python3-twisted –  25.5.0-5ubuntu0.2
24.04 LTS noble python3-twisted –  24.3.0-1ubuntu0.3
22.04 LTS jammy python3-twisted –  22.1.0-2ubuntu2.8

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.


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